Lara Technologies Special-Six Test

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Bartholomew Crawford
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Flow control Part-1 Q: 01 Given: 10. public class Bar 11. static void foo( int... x ) 12. // insert code here 13. 14.

1 Flow control Part-1 Q: 01 Given: 10. public class Bar 11. static void foo( int... x ) 12. // insert code here Which two code fragments, inserted independently at line 12, will allow the class to compile? (Choose two.) A. foreach( x ) System.out.println(z); B. for( int z : x ) System.out.println(z); C. while( x.hasnext() ) System.out.println( x.next() ); D. for( int i=0; i< x.length; i++ ) System.out.println(x[i]); Q: 02 Click the Task button.

2 Q: 03 Given: 25. int x = 12; 26. while (x < 10) 27. x--; System.out.print(x); What is the result? A. 0 B. 10 C. 12 D. Line 29 will never be reached. Q: 04 Given: 11. public static void main(string[] args) 12. Object obj = new int[] 1, 2, 3 ; 13. int[] somearray = (int[])obj; 14. for (int i : somearray) System.out.print(i + " "); 15. What is the result? A B. Compilation fails because of an error in line 12. C. Compilation fails because of an error in line 13. D. Compilation fails because of an error in line 14. E. A ClassCastException is thrown at runtime. Q: 05 Given: 11. public static void main(string[] args) 12. for (int i = 0; i <= 10; i++) 13. if (i > 6) break; System.out.println(i); 16. What is the result? A. 6 B. 7 C. 10 D. 11 E. Compilation fails. F. An exception is thrown at runtime.

3 Q: 06 Given: 11. public static void main(string[] args) 12. Integer i = new Integer(1) + new Integer(2); 13. switch(i) 14. case 3: System.out.println("three"); break; 15. default: System.out.println("other"); break; What is the result? A. three B. other C. An exception is thrown at runtime. D. Compilation fails because of an error on line 12. E. Compilation fails because of an error on line 13. F. Compilation fails because of an error on line 15. Q: 07 Given: 10. public class ClassA 11. public void count(int i) 12. count(++i); And: 20. ClassA a = new ClassA(); 21. a.count(3); Which exception or error should be thrown by the virtual machine? A. StackOverflowError B. NullPointerException C. NumberFormatException D. IllegalArgumentException E. ExceptionInInitializerError Q: 08 Given: 35. int x = 10; 36. do 37. x--; 38. while (x < 10); How many times will line 37 be executed? A. ten times B. zero times

4 C. one to nine times D. more than ten times 9. Given the following code: public class OrtegorumFunction public int computediscontinuous(int x) int r = 1; r += x; if ((x > 4) && (x < 10)) r += 2 * x; else (x <= 4) r += 3 * x; else r += 4 * x; r += 5 * x; return r; public static void main(string [] args) OrtegorumFunction o = new OrtegorumFunction(); System.out.println("OF(11) is: " + o.computediscontinuous(11)); What is the result? A. OF(11) is: 45 B. OF(11) is: 56 C. OF(11) is: 89 D. OF(11) is: 111 E. Compilation fails. F. An exception is thrown at runtime. 10. Given: 1. class Crivitch 2. public static void main(string [] args) 3. int x = 0; 4. // insert code here 5. do while (x++ < y); 6. System.out.println(x); Which, inserted at line 4, produces the output 12?

5 A. int y = x; B. int y = 10; C. int y = 11; D. int y = 12; E. int y = 13; F. None of the above will allow compilation to succeed. 11. Given: class Swill public static void main(string[] args) String s = "-"; switch(timezone.cst) case EST: s += "e"; case CST: s += "c"; case MST: s += "m"; default: s += "X"; case PST: s += "p"; System.out.println(s); enum TimeZone EST, CST, MST, PST What is the result? A. -c B. -X C. -cm D. -cmp E. -cmxp F. Compilation fails. G. An exception is thrown at runtime. 12. Given: class Circus public static void main(string[] args) int x = 9; int y = 6; for(int z = 0; z < 6; z++, y--) if(x > 2) x--; label: if(x > 5)

6 System.out.print(x + " "); --x; continue label; x--; What is the result? A. 8 B. 8 7 C D. Compilation fails. E. An exception is thrown at runtime. 13. Given: 1. class Loopy 2. public static void main(string[] args) 3. int[] x = 7,6,5,4,3,2,1; 4. // insert code here 5. System.out.print(y + " "); Which, inserted independently at line 4, compiles? (Choose all that apply.) A. for(int y : x) B. for(x : int y) C. int y = 0; for(y : x) D. for(int y=0, z=0; z<x.length; z++) y = x[z]; E. for(int y=0, int z=0; z<x.length; z++) y = x[z]; F. int y = 0; for(int z=0; z<x.length; z++) y = x[z]; 14. Given: 1. class Ring 2. final static int x2 = 7; 3. final static Integer x4 = 8; 4. public static void main(string[] args) 5. Integer x1 = 5; 6. String s = "a"; 7. if(x1 < 9) s += "b"; 8. switch(x1)

7 9. case 5: s += "c"; 10. case x2: s += "d"; 11. case x4: s += "e"; System.out.println(s); What is the result? A. abc B. abcde C. Compilation fails due only to an error on line 7. D. Compilation fails due only to an error on line 8. E. Compilation fails due only to an error on line 10. F. Compilation fails due only to an error on line 11. G. Compilation fails due to errors on multiple lines. Part-2 1) public void foo( boolean a, boolean b) if( a ) System.out.println("A"); /* Line 5 */ else if(a && b) /* Line 7 */ System.out.println( "A && B"); else /* Line 11 */ if (!b ) System.out.println( "notb") ; else System.out.println( "ELSE" ) ; A. If a is true and b is true then the output is "A && B" B. If a is true and b is false then the output is "notb" C. If a is false and b is true then the output is "ELSE" D. If a is false and b is false then the output is "ELSE" 2) int i = l, j = -1;

8 switch (i) case 0, 1: j = 1; /* Line 4 */ case 2: j = 2; default: j = 0; System.out.println("j = " + j); A. j = -1 B. j = 0 C. j = 1 D. Compilation fails. 3) public class Switch2 final static short x = 2; public static int y = 0; public static void main(string [] args) for (int z=0; z < 3; z++) switch (z) case x: System.out.print("0 "); case x-1: System.out.print("1 "); case x-2: System.out.print("2 "); A B C D

9 4) public void test(int x) int odd = 1; if(odd) /* Line 4 */ System.out.println("odd"); else System.out.println("even"); Which statement is true? A. Compilation fails. B. "odd" will always be output. C. "even" will always be output. D. "odd" will be output for odd values of x, and "even" for even values. 5) public class While public void loop() int x= 0; while ( 1 ) /* Line 6 */ System.out.print("x plus one is " + (x + 1)); /* Line 8 */ A. There is a syntax error on line 1. B. There are syntax errors on lines 1 and 6 C. There are syntax errors on lines 1, 6, and 8. D. There is a syntax error on line 6.

10 6) int i = 1, j = 10; do if(i > j) break; j--; while (++i < 5); System.out.println("i = " + i + " and j = " + j); A. i = 6 and j = 5 B. i = 5 and j = 5 C. i = 6 and j = 4 D. i = 5 and j = 6 7) boolean bool = true; if(bool = false) /* Line 2 */ System.out.println("a"); else if(bool) /* Line 6 */ System.out.println("b"); else if(!bool) /* Line 10 */ System.out.println("c"); /* Line 12 */ else System.out.println("d");

11 A. a B. b C. c D. d 8) public class If1 static boolean b; public static void main(string [] args) short hand = 42; if ( hand < 50 &!b ) /* Line 7 */ hand++; if ( hand > 50 ); /* Line 9 */ else if ( hand > 40 ) hand += 7; hand++; else --hand; System.out.println(hand); A. 41 B. 42 C. 50 D. 51

12 9) for (int i = 0; i < 4; i += 2) System.out.print(i + " "); System.out.println(i); /* Line 5 */ A B C D. Compilation fails. 10) public class Delta static boolean foo(char c) System.out.print(c); return true; public static void main( String[] argv ) int i = 0; for (foo('a'); foo('b') && (i < 2); foo('c')) i++; foo('d'); A. ABDCBDCB B. ABCDABCD C. Compilation fails D. An exception is thrown at runtime.

13 Part-3 1 ) for(int i = 0; i < 3; i++) switch(i) case 0: break; case 1: System.out.print("one "); case 2: System.out.print("two "); case 3: System.out.print("three "); System.out.println("done"); A. done B. one two done C. one two three done D. one two three two three done 2) public class Switch2 final static short x = 2; public static int y = 0; public static void main(string [] args) for (int z=0; z < 4; z++) switch (z) case x: System.out.print("0 "); default: System.out.print("def "); case x-1: System.out.print("1 "); break; case x-2: System.out.print("2 "); A. 0 def 1 B def 1 C def def

14 D def 1 def 1 3) public class Outer public void someoutermethod() //Line 5 public class Inner public static void main(string[] argv) Outer ot = new Outer(); //Line 10 Which of the following code fragments inserted, will allow to compile? A. new Inner(); //At line 5 B. new Inner(); //At line 10 C. new ot.inner(); //At line 10 D. new Outer.Inner(); //At line 10 4) Float f = new Float("12"); switch (f) case 12: System.out.println("Twelve"); case 0: System.out.println("Zero"); default: System.out.println("Default"); A. Zero B. Twelve

15 C. Default D. Compilation fails 5) public void test(int x) int odd = 1; if(odd) /* Line 4 */ System.out.println("odd"); else System.out.println("even"); Which statement is true? A. Compilation fails. B. "odd" will always be output. C. "even" will always be output. D. "odd" will be output for odd values of x, and "even" for even values. 6) public class Switch2 final static short x = 2; public static int y = 0; public static void main(string [] args) for (int z=0; z < 3; z++) switch (z) case y: System.out.print("0 "); /* Line 11 */

16 case x-1: System.out.print("1 "); /* Line 12 */ case x: System.out.print("2 "); /* Line 13 */ A B C. Compilation fails at line 11. D. Compilation fails at line 12. 7) int x = l, y = 6; while (y--) x++; System.out.println("x = " + x +" y = " + y); A. x = 6 y = 0 B. x = 7 y = 0 C. x = 6 y = -1 D. Compilation fails. 8) public class While public void loop() int x= 0; while ( 1 ) /* Line 6 */ System.out.print("x plus one is " + (x + 1)); /* Line 8 */

17 Which statement is true? A. There is a syntax error on line 1. B. There are syntax errors on lines 1 and 6. C. There are syntax errors on lines 1, 6, and 8. D. There is a syntax error on line 6 9) public class Test public static void main(string [] args) int I = 1; do while ( I < 1 ) System.out.print("I is " + I); while ( I > 1 ) ; A. I is 1 B. I is 1 I is 1 C. No output is produced D. Compilation error 10) int x = 3; int y = 1; if (x = y) /* Line 3 */ System.out.println("x =" + x);

18 A. x=1 B. x=3 C. Compilation fails. D. The code runs with no output. 11) Here is the hierarchy of exceptions related to array index and string index errors: Exception +-- RuntimeException +-- IndexOutOfBoundsException +-- ArrayIndexOutOfBoundsException +-- StringIndexOutOfBoundsException Suppose you had a method X that could throw both array index and string index exceptions. Assuming that X does not have any try-catch statements, which of the following statements are correct? (a) The declaration for X must include throws ArrayIndexOutOfBoundsException, StringIndexOutOfBoundsException. (b) If a method calling X catches IndexOutOfBoundsException, both array and string index exceptions will be caught. (c) If the declaration for X includes throws IndexOutOfBoundsException, any calling method must use a try-catch block. (d) The declaration for X does not have to mention exceptions. 12) Which will be the first line to cause an error in the following code? Select one correct answer. 1 class Char 2 3 public static void main(string arg[]) 4 5 while(false) 6 7 System.out.println("Hello"); 8 9 while(false) do; 13 while(false); 14 do ;

19 17 18 while(false); (a) Line no. 5 (b) Line no. 9 (c) Line no. 12 (d) Line no ) What will be the result of compiling and running the given program? Select one correct answer. 1 public class exception 2 3 public static void main(string args[]) 4 5 System.out.println("A"); 6 try catch(java.io.ioexception t) System.out.println("B"); System.out.println("C"); (a) Compile time error. (b) Program compiles correctly and prints "A" when executed. (c) Program compiles correctly and prints "A" and "C" when executed. (d) Run time error. 14. What will be the result of compiling and running the given program? Select one correct answer. 1 public class exception 2 3 public static void main(string args[]) 4 5 System.out.println("A"); 6 try

20 7 8 return; 9 10 catch(exception e) System.out.println("B"); System.out.println("C"); (a) Compile time error in line no. 8 as main() method is declared void. (b) Program compiles correctly and prints "A" when executed. (c) Program compiles correctly and prints "A" and "C" when executed. (d) Compile time error at line no.14 due to statement not reached. 15. What will be the result of compiling and running the given program? Select one correct answer. 1 public class exception 2 3 public static void main(string args[]) 4 5 System.out.println("A"); 6 try 7 8 return; 9 10 catch(exception e) System.out.println("B"); finally System.out.println("C"); (a) Compile time error in line no. 8 as main() method is declared void. (b) Program compiles correctly and prints "A" when executed. (c) Program compiles correctly and prints "A" and "C" when executed. (d) Program compiles correctly and prints "A","B" and "C" when executed.

21 16. What will be the result of compiling and running the given program? Select one correct answer. 1 public class exception 2 3 public static void main(string args[]) 4 5 System.out.println("A"); 6 try 7 8 System.out.println("B"); 9 System.exit(0); 9 10 catch(exception e) System.out.println("C"); finally System.out.println("D"); (a) Program compiles correctly and prints "A" when executed. (b) Program compiles correctly and prints "A" and "B" when executed. (c) Program compiles correctly and prints "A" and "C" when executed. (d) Program compiles correctly and prints "A","B" and "C" when executed.

1.Which four options describe the correct default values for array elements of the types indicated?

1.Which four options describe the correct default values for array elements of the types indicated? 1. int -> 0 2. String -> "null" 3. Dog -> null 4. char -> '\u0000' 5. float -> 0.0f 6. boolean -> true